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Abstract

Monolayers of i-propanol ((CH(3))(2)CH-OH) were adsorbed at 125 k on graphite covered Pt(111) single crystal surfaces and subjected to fluxes of thermal H atoms. The mechanisms of the reactions of i-propanol (OH, OD) with H(D) atoms were investigated with thermal desorption spectroscopy (TDS). The overall reaction consists of oxidation of i-propanol to acetone. Alternatively, i-propanol is restored from the radical via H addition to the radical carbon centre. Likewise, adsorbed acetone is transferred into i-propanol by H impact. The presence of the OH group in the target molecule i-propanol enhances the abstraction reaction cross-section at the CH group by a factor of about 5 as compared to abstraction from CH(2, 3) groups of physisorbed alkanes.

Additional information

Authors: KUPPERS J, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);BIENER J, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);LUTTERLOH C, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);SCHENK A, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);POHLMANN B, Universität Bayreuth, Experimentalphysik VI (DE)
Bibliographic Reference: Article: Surface Science, Vol. 365 (1996) pp. 255-262
Record Number: 199611296 / Last updated on: 1996-11-11
Category: PUBLICATION
Original language: en
Available languages: en